AES_ENCRYPT in model

On model level, we can always encrypt value in function beforeSave, but i don't know how to make fetch in the same way, so when i fetch data, there are automatilcy AES_DECRYPT. I want to do this without phsql.

You should first decide where to put the encrypt/decrypt logic. You CAN have encryption on SQL and decryption on PHP side, but that requires you to share the same encryption key between the two systems (bad idea).

Phalcon has built-in security methods, you'd be better off using that (you also have more control over the key/algo/padding).

mcrypt is now earmarked as deprecated, any decent dev would refrain from building a project which utilizes it.
As we advised, the best approach for this is to drop mcrypt altogether, and use the built-in methods of Phalcon.

If you want to stick with mcrypt, it's up to you, but don't come looking for help on the dedicated channel for Phalcon ;] (no offense intended)